ENH: consistency improvements for surface patch handling (fixes #483)

- remove (unused) Istream constructors, prune some unused methods,
  rationalize write() vs writeDict().
  Deprecate inconsistent construction order.

- handle empty names for ".ftr" surface patches (for plain triSurface
  format) with double-quoted strings for more reliable streaming.
  Written on a single line.

  This is _backward_ compatible, but if users have been parsing these
  files manually, they will need to adjust their code.

Previously:
```
  (
  frt-fairing:001%1
  empty

  windshield:002%2
  empty
  ...
  )
```

Updated (with example handling of empty name):
```
  (
  frt-fairing:001%1 empty

  windshield:002%2 ""
  ...
  )
```

etc/controlDict

@@ -588,7 +588,6 @@ DebugSwitches
     generic             0;
     genericPatch        0;
     geomCellLooper      0;
-    geometricSurfacePatch   0;
     global              0;
     globalIndexAndTransform 0;
     globalMeshData      0;
@@ -880,7 +879,6 @@ DebugSwitches
     surfaceInterpolationScheme 0;
     surfaceIntersection 0;
     surfaceNormalFixedValue 0;
-    surfacePatch        0;
     surfaceScalarField  0;
     surfaceScalarField::Internal 0;
     surfaceSlipDisplacement 0;